The "Birthday Cake" blue birthday invitations are blank cards that coordinate with all other Celebration Sensations "Birthday Cake" products. These invitations feature a birthday cake against a blue background, and have a white border, streamers, and confetti decorations, which carry over to the card reverse. The "Birthday Cake" blue birthday invitations are generously sized at 7"x4.5", giving you plenty of room to write your birthday party information. These cards make great thank you cards too! Envelopes are included.